Therapy for collagen diseases by using chemokine antagonists

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The use of receptor antagonists for chemokines is an alternative approach to blocking cnemokine actions and has the potential to provide novel therapeutics for autoimmune diseases. The NH_2-terminally truncated MCP-1 or fractalkine analogues were converted to secreting forms, inserted into the pCXN2 expression vector and transfected into a non-metastatic fibroblastoid cell tin. MRL/N-1. MCP-1-antagonist-or fractalkine-antagonist-transfected MRL/N-1 cells were injected subcutaneously into MRL/lpr mice aged 7 wk (before the initiation of lupus nephritis) and 12 wk (at the early stage of the disease) After 8 weeks, MCP-1-antagonist-and fractalkine-antagonist-bearing mice showed markedly diminished infiltration of macrophages and T cells, glomerular hypercellularity, glomerulosclerosis, crescent formation and also vasculitis compared with control mice. In addition, MCP-1-antagonist-bearing mice ameliorated the progression of sialadenitis compared with control mice. To determine whether SLC antagonist inhibits the development of chronic GVHD, chronic GVHD was induced by injecting DBA/2 spleen cells into (C57BL/6 X DBA/2) F1 mice. Total numbers of spleen cells and host B cells, serum levels of IgE, and of total IgG and IgG1 of anti-DNA antibodies in SLC antagonist-treated GVHD mice were significantly lower than those in control PBS-treated GVHD mice. This result suggests that SLC antagonist has beneficial effects for the prevention of chronic GVIHD.